Explain why FeF63– is colorless while CoF63– exhibits

QUESTION 1Explain why FeF63– is colorless while CoF63– exhibits a single absorption band in the visible region.Check 2 Answers1- FeF63– is high spin d5 should have a single d – d spin allowed transition.2- FeF63– is high spin d5 with no d – d spin allowed transitions.3- FeF63– is low spin d5 with no d – d spin allowed transitions.4- CoF63– is high spin d6 should have a single d – d spin allowed transition.5- CoF63– is high spin d6 with no d – d spin allowed transition.6- CoF63– is low spin d6 with no d – d spin allowed transitions.CoF63– is low spin d6 should have a single d – d spin allowed transition.QUESTION 2Name K2[FeO4]potassium ferrate(II)dipotassium ferrate(II)potassium tetraoxoferrate(II)diotassium tetraoxoferratedipotassium tetraoxoferrate(II)QUESTION 3During the reductionsA. Fe(CN)63- → Fe(CN)63-B. Co(NH3)63+ → Co(NH3)62+the metal–ligand distance changed as follows:metal–ligand distance shortens equally in both cases.metal–ligand distance lengthens equally in both cases.metal–ligand distance lengthens more in reduction A more than in reduction Bmetal–ligand distance lengthens more in reduction B more than in reduction AQUESTION 4Using a nominal value of Δo for CN– with a transition metal ion of 25,000 cm–1, estimate the value of:1- Δt for CN–2- Δo for NH33- Δc for H2O4- Δo for 4 NH3 & 2 H2OA. 11,100 cm–1B. 13,100 cm–1C. 14,700 cm–1D. 17,200 cm–1E. 18,400 cm–1F. 25,000 cm–1

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